INSULATING FILMS THERMALLY CONDUCTIVE

1. Dielectric Films with Phase Change CoatingCoating of electrically insulating films such as Kapton®MT or other engineering plastics having an enhanced thermal conductivity with phase change compounds softening from certain temperatures on, leads to minimizing thermal contact resistances, thus the total thermal resistances will be reduced. During warm-up, phase change coatings start filling up surface-specific roughnesses and/or unevenesses and expel any air enclosures from micro structures. The wettening of the contact areas is furtheron improved by volumetric material expansion at increasing temperature. Convex and concave surface structures stack up tolerances can widely be compensated by the use of these materials. Thixotropic nature prevents run-out. The thicknesses are characterized by high process reliability what among others makes these films ideal for replacing thermal greases. All carrier films are characterized by a high mechanic tensile as well as tear strength.

Properties and advantages in brief:

Extremely low thermal resistances less than 0.15°C-inch²/W through

entire thermal contact

Silicone-free

No dry up, pump out, migration

No run-out through thixotropic properties

Contact coating effective at room temperature

Process reliable coating thicknesses

Ideal to replace messy thermal grease

Available as:

Sheet or roll

Kiss cut parts on roll

Die cut parts

Other phase change thicknesses on request

With or without tackiness

Some application examples:

Thermal link of:

LED's

MOSFETs and IGBTs to heat sinks

Diodes and A.C. converters to heat sinks

Discrete controllers to housings

Displays to heat sinks

For use in:

Automotive motor control units

Power supplies

Power inverters

Telecom appliances

2. Thermally Conductive Dielectric PSA TapesAdhesive tapes, having increased thermal conductivities are based on pressure sensitive high bonding dielectric acrylate or silicone adhesives either as free-standing films or made as dielectric engineering plastics which are coated with a high bonding PSA on both sides. Through the thermally conductive adhesive the thermal contact is highly improved, thus minimizing the total resistance, even at low pressures. Materials with different expansion coefficients can easily be bonded, thus giving a reliable thermal link.

Convex and concave surface structures stack up tolerances can widely be compensated by the use of these materials.

The therrmally conductive adhesive films work well for realizing an easy effective and cost-efficient thermal link of non-dielectric electronic packages to heat sinks. Above all they are used in applications having little space only and where their permitted weight is very limited. Using screws, springs, clips as mechanic fasteners, thus becomes superfluous.

Properties and advantages in brief:

Silicone-free acrylate or silicone based

Very low thermal resistances of less than 0.3 °C-inch²/W through excellent thermal contacts